Machine for nailing metal straps to wooden slats



a. PARKS v MACHINE FOR NAILING METAL STRAPS TO WOODEN SLATS I Feb. 191924.

Filed July 29 1922 Y '2 sheets-shes"; 1

INVENTOR 6/6 7 Pair/r5 @wn FWWQ ATTORNEY3.

Feb. 19 1924. I

G. PARKS MACHINE FOR NAILING METAL .STRAPS T0 WOODEN SLATS Filed July 291922 2 Sheets-Sheet-Z I ATTORNEY5.

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I UNITE" STATE. r)

GLEN PARKS, 0F SEATTLE, wAsHI-Netron, nssrenoiror: own-HAL FLYNN, orSEATTLE, wnsnmemo I TO HOBART ,MAGHINE 120R NAILING METAL sinners TowooDEN' s LATs; 1

Application filed Ju1y129, 1 9 22 Serial inc. 578,413.

To all whom it may concern:

Be it known that I, GLEN PARKS, a c tizen of the United States, residingat Seattle, 1n

the county of King and State of Washing ton, have invented certain newand useful Improvements in Machines for Nailin'g Metal Straps to Wooden.Slatsjand I ,do

hereby declare the following'to be a full,

clear, and exact description of the invention, such as will enableothers skilled. in the art to which it appertains to make and use thesame.

This invention relates to machines for nailing metal straps to woodenslats," and particularly to a machine for nailing a short section ofstrapmetal" to each end of a wooden slat, to be used in fasteningtogether bunches or roof shingles.

In ordinary commercial handling of house straps. In so packing theshingles, one of the slats is provided before-hand with metal straps.The shingles are then packed over the said slat and then the other slatis laid across the topside of the bunch and the free endsof the metalstraps nailed to the top. 7 V, v s V f 6 indicates a magazine-in'towhich 'sl.ats' 7 are horizontallydisposed? These slatsa're slat. r l

It is'an object of this invention to provide a machine for providing oneof the said 1 slats with metal straps. 4

A further object is to, provide a machine in which the feeding of thewooden slats tion of the invention taken in connectionv with theaccompanying. drawings forming part of the specification, thenovelcombin'ation of parts being set forth in the appended claims. H 7

In the drawings 7 I Figure 1 is anirr'egular vertical section takensubstantially along line 1-1 of oonstit ut'in 'Fig. 2 is an irregularverticah section taken substantially alongfgline 2 2- *of Fig. 1; P

Fig. 3 i n'enlarged m m fim y de of the rollers for feeding. the metalistrap tions;

ing hlow 'nails' are fed to thei-lnailing 'ap- 'paratus'; 'f V V J Fig.5 is an enlarged sectional I'view through, a jaw' 'which mounts th enailing mechanism; s

' Flg'. 6 1s a sideelevationof' a cam .wheel chine, and

g 0116 oi h e efth rtina- In theiIdrawin'gs,- 1 is a frame havingstandards 2 in which is mounted a horizon-v tally disposedjsha'ft 3'having at one'en'dia V pulley 3 by which'the shaftlfmayiberotated from asuitable source of pewerx; Fi e'd' to the shaft and arranged spacedrelation thereon are annular slat-carriers Each carrier has a hookglikejaw'5 s oc disposed that a slat' may be supported; across? sa'idcarriers parallel tothe'shaft" 3.. A pairo-f" jaws is provided on eachcarrier.

adapted to be fedv int-othe carrier..jaws'5 V appropriate times bymechanism"' compris ing a lever 8 disposedmidway saidcarriersand'pivoted as'at 9 below'tlie magaZine or; receptacle 6. the*leverhavingia fin gerjlO which is adapted to engage behindtheibottomslat to. push it out ofthe receptacle, the

slat then. slidingdowngthe .inc'linedway 1 1 .into positionito be pickedup' by'the' 'jawsfi as the .oarriersturn. The other. endfofithe Vlever 81has a knob .12 which ieadapgt ed to be wiped by the slat alreadyinplace o-nthe" dislodgeitfrom the slatgreceptacle, When carriers as theslat is beingrcarried along to Y discharge position; i 13Qindicatesjtheway down which theslat'moves] as it 'isfdi'sr V f charged fromjthjecarrier jaws. f It will now;

be understood that wipingof the knob 12 causes the lever to berocked onits p'ivot. 9 and hence the finger 10 will engage ,a slat to I slat hasb'een carried to upright position as V shown in Figs. .1 and 2, metalribbons or straps are secured to the ends thereof by posed as to feedthe ribbon toward the'ends of the slat. In Fig. 2 is shown one of suchspools 14 supported on a bracket 15 projecting from the frame, the leadsfrom the spool being identified as 1% at both sides of the These leadsare drawn from their machine. spools by rollers 16, 17 3) which aregeared together by gears 16 and 17 at their adjacent ends. Theupperroller 16 is yieldingy held. to the lower roller 17 as by springs 16 itbeing understood that the shaft of said roller 16 is mounted in movable1 bearing blocks 18 on which said springs act.

As the ribbon is drawn'through its rollers it enters a guideway 19 fromwhence it discharges across the slat-carying jaw 5 over the end of theslat therein,;-(see Fig. 2)

ready to be nailed thereto by mechanism The means for driving theribbon-feeding rollers 16, 17 will now be described. EX-

.tending radially from the lower roller is a plurality of fingers 20(six in the present instance) which are adapted to be wiped by a 1plurality ofcamelements 21 secureclto the sideof a disk 22 affixed tothe shaft 3. These cam elements are curved members which extend from theperiphery toward't re hub 22 of the wheel 22.. By reference to Fig-.16,it will be seen thatsix camelements are. provided. Two of these cams,

. namely, elements o terminate short of the hub 22' and. consequentlythe contactingfinger 20 of roller 17 is not carried down'as 7 far as thecase whenwiped by cams b or 0 for example. This arrangement provides aperiod of rest of the rollers which lastsuntil the next finger isengagedby the next cam 7) (see Fig. 2). 'During said period of resttheribbon is stationary and is being nailed to" .the slat '7 There aretwoperiods of rest during one revolution of the shaft 3- correspondingto the two jaws-5 on the carriers 4.

Inasmuch as the ribbon is a continuous fniember, suitable lengths ofribbon must be severed from the spool. This iseffected by. cuttingmeans. on the feed rollers 16 and 17, .seeFig. ,holes in the-ribbon isalso provided and nail "Means for punchin will be first described; Theupper roller 16 Q carries a radial punch 23 which is adapted v to entera socket24 on the roller 17. The

' punchtherefore,.passes through the ribbon, j

thus providing a nail hole. A. pair. of

. spaced punches are provided and between lthem is located means forsevering the rib- It follows, therefore, that both [of the severedribbon strap, as it .may

conveniently be called, is perforated at both pocket or jaw 5.

ends, ,i. e., not only the end which is nailed.

ends of the ribbon to beheld-until further movement of the rollersrelease the severed portion.

Means are provided for securely holding the slat in position on thecarriers 4 during the nailing operation. -Projecting laterally from oneside of the carrier is 'a pair of brackets 26, one adj acent each aw"5.Each bracket :mounts a sliding wedge -'27. A springQStends to force thewedge into the in a hook 29. Thisho'olc engages with an endless guide orcainBO 'dispose'daround t 1e shaft 8. l his guide is'dished as at 31toward the adjacent carrier A above the shaft3. 'lhe construction of theguide is therefore such as to hold the wedge away from the jaw 5 except;when the jaw is substantially over the shaft or, in other words, duringthe operation of which terminates Theuwedge has a stem;

nailing the strap to the slat, and for a 1 period following suchoperation or until the slat has been carried to discharge position, llhewedge face has a fluted or dished face (not shown) to deflect the nailspass ing through the slot and consequently to. clinchthe nails. Prior'tothe wedges passing under the ends of the slat, the latter is lifted by aspring disposed adjacent each carrier.

The means for drivingithe nails through the slat and ribbon will next bedescribed. Eaeh aw 5 carries a plunger rod 35 having and thus graduallyforcing the nail through The balls 89 which are pressed toward each.other by springs 40. Thesespringpressed-balls serve to center thenailsd1 as- -they are received by the conduit 42 in the jaw 5. The plunger 35pressing on the nail causes the latter, to. force aside the ballsas doesthe plunger in its movementin, forcing the nail home. lln Fig. 5, thejaw 5' is shown as provided with a plate, l3 behind which the balls 39are confined. i V The means for feeding the nails to the jaws 5 willnext be descr ed. 44.- indicates a chute down which nails slide from aL'Ji fee

as a nail distributor.

following manner.

a pendant position by their heads.

container hereinafter described; This chute has a depending member inwhich is journaled a shaft 46 having at one end a four-pointed starwheel 47 which is adapt ed to be contacted by a striker 48 affixed toone sideof the jaw 5. The other end of the shaft carries a disk 49which-serves One face of this disk is provided'with appropriate slots 50into which a nail is received from the chute 44 as the slot passesthefslit in said'chute.

After a nail has been thus received-it slides down a guideway 51 in thedisk and drops into a funnel 552 which is carried by the jaw 5; Itwillbeunderstood that after a nail has been'received into the slot 50 inthe distributor, further discharge of nails from the chute 44"isprevented by the flat face of the disk cutting off such discharge.

Nails are supplied'to the chutes 44'inrthe nails are deposited. in anysuitable inanneras on rollers-54 on a shaft On one end of this shaft isa pulley 56 over which passes a belt 57 which also gpasscs over a pulley58fiXed on astub shaft 59 extending transversely to the main shaft 3.Shaft 59 is driven by a shaft 60through bevel gears 61, said'shaftfiOextending across oneend of the drum 53 and parallel to the mainshaft 3. Shaft 60 is driven from "shaft '8 by a crossed belt 60" loopedover" pulleys 62 and63 on shafts 3 and 60,respectively.

Extending through drum 53 from end to end thereof is aslit-nail-co'nveying belt 64. This belt is'looped over a pulley 65on'shaft (10' and over an idler '66 at the other end of thedrunn saididler being. supported on a' standard -67 which extends into thejdrum..

(38 indicates radial flangesat each end of the drum to prevent the nailsfrom falllngout.

Affiied to the drum'is a series of inwardly extending shelves 69' whichare adapted to pick up nails and dump them on a fixed-ilk elined'plate 0supported within the drum as by standards 71 rising from ahorizontal bar72 supported at one e'nd'on standard 67at the end of the drum. The loweredge of the plate TO'is disposed over-the travelling belt '4 so that anail sliding down said plate may fall on the belt; Inasmuch as thebeltis slit some of the nails will be caught and held in conveys thenails to a receiver 73 which tra nsfers the nails to the chutes 44 (seeFig. 2)

down which the nailsslideby gravity as will be understood. Y j v e .1

53 is a drunrinto which. The drum is supported The belt The operation ofthe machine may be briefly: described as follows. J Assuming that theshaft 3 isbeing rotated from any suitable source of power and theta slateirtends between thetwo carriers 4 as shown in Figs. 1

and 2,'c0nti11ued rotation of the carriers will cause the slat 7 to wipethe knob 12on lever 8 causing the same to dislodge the bottom slat Tinthe magazine 6 at-the front of the machine, the slat being depositedadjacent the rims of the carriers in position to be picked up bythe aws5as the'carriers are rotated. The slat, whlle being acted upon bythenailing mechanism, is held in close'relat'ion with the overhangof-the j aw 5'by the wedge 27.

As the slat is carried along to discharge posi-' tion, the wedges arewithdrawn 'fromengagementwith the bottom ofthe slat byreason of thehooks '29 of the wedges being drawn out- Jwardly by the cam rings 30,thereby leaving the slats free to drop out of the jaws 5 and onto thedischarge ways'18.- After a slat has been picked up. by the rising jaws5 and has been carried to a position directly" above shaft 3 oras shownin Figs. 1 and 2, the metal ribbon 14 is fed or movedbeneaththe overhangofthe j'aw 5. and over the slat'prior to v the movement of the wedge 27'beneath the slat. Before the wedge has come into action the .slat hasbeen lifted upwardly against the overhang ofthe jaw 5' the spring bar32' after which the wedge shoots into place by" reason ofthe abrupt dishor lateral step'54 in the cam guide 30. When the jaw,5 is at the topas'said the nail distributor 49 is ac- Y tuated by the striker 48attached to said-jaw to feed a nail intothe conduit42 insaid jaw beneaththe nailing plunger 35.- Continued rotation of the carrier will causethe cam bar 38 to act on the shoe 36 at'the outer extremity of the-nailingplunger'85 and gradually de- )ress the latter thus -eausin thelun er to tion for substantially a quarter revolution or until theslatis lliPOSltlOHtO be dropped onto the discharge Way 18.. Theribbon;or strap perforated .as it passes between the feed rollers 16 and 17 andis severed from the spool by the shear blades 25 on said rollers as willbe-recalled. --The feeding of the ribbon 0r strap toward the carriers ispracticallycontinuous until the. strap has been projected suflicientlyffar overthe ends of the slat preparatory to being n'ailedthereto,feeding of the strap. being momentarily discontinued while thestrapisbeingna-iled tothe slat, it

beingi-ecalled that the cam wheel 22 is designed to permit a pauseinth'e feeding of the ribbon or strap. During rotation of the shaft 8,the drum 53 is continually rotating to elevate'nails therein and todischarge the same onto the inclinedplate 70 from whence they fall onthe upper run of the nail-carry- I mg belt,64, said beltdischargingnai-ls into press the nail through the metal-strap and slat.The-plunger is heldin depressedposi- &

receiver 73 from which the nail-carrying chutes l diverge toward theirrespective carriers. V Y

The above described machine enables straps to be nailedonto the ends ofthe slats said disks for nailing straps fed to the slats.

7 2 In combination, a shaft, a pair of disks aflixed thereto, meanssupported by said disks for receiving and holding slats, means forfeeding slats to said holding 'means, -means for feeding straps to slatswithin said holding means, and means carried by said disks for nailingthe straps to the'slats.

3. In combination, a shaft, a pair of disks affixed thereto, jaws on thevperiphery of said disks, said disks and jaws constituting carriers forslats, means for feeding slats to said carriers, means for feedingstraps beneath said jaws, and means for nailing said straps to theslats.

4L. lhe combination as in claim 3, and means for firmly holding saidslats during the nailing operation.

5. In combination, a shaft, a pair of disks affixed thereto, jaws on theperiphery of said disks, said disks and jaws constituting carriers forslats, said slats being adapted tobe disposed across said carriers inparailel relation to said shaft, means adjacent said disks for feedingmetal ribbons over the ends of said slats, nailing means carried by saidjaws, means for feeding nails to said nailing means, and means foroperating said nailing means as the carriers rotate,

6. In combination, a shaft, a pair of disks affixed thereto, jaws on theperiphery of said disks, said disks and jaws constituting carriers forslats, said slats being adapted to be disposed across said carriers inparallel relation to said shaft, means for feeding metal straps over theends of said slats, means forcing the ends of said slats and overlyingstraps against the aws, a plunger carried byeach jaw, means forfeedingnails beneath said plungers, and means for moving said plungerstoward the slats toforce the nails through said straps and slats.

7. In combination, a shaft, a pair ofdisks affixed thereto, jaws on theperi ahery ef said disks, saiddisks and jaws constituting carriers forslats,said slats beingadapted to be disposed across said carriers inparallel relation to said shaft, brackets PlOjGGting from saiddisksadjacent said jaws, sliding wedges carried by said brackets, meansnormally maintaining said wedges away from the pockets of said jaws, andmeans slat therefrom.

permitting said wedges to move into said pockets after a slat is inplace therein.

8. In combination, a shaft, a pair of disks affixed thereto, jaws on theperiphery of said disks, said disks and jaws constitutingcarriers forslats, said slats being adapted to be disposed across said carriers inparallel relation to said shaft, brackets carried by said disks adjacentsaid jaws, wedges car ried by said brackets, means to project saidwedges into the pockets formed by said jaws, an annular cam guide, andmeans on guide, said cam guides having an abrupt said wedges inengagement with said cam" 9. In combination, a shaft, a pairof disks.affixed thereto, jaws on the periphery of said disks, said. disks andjaws constituting carriers for slats, said slats being adapted to bedisposed across said carriers in parallel relation to said shaft, aslatmagazine at one ,side'of said shaft. and means for ejecting a slatfrom thebottom of said magazinein position-to be pickedup bysaid jaws,said means being operated by a slat already in the carrier prior to thedischarge of said 10. Incombination, disks affixed thereto, jaws on theperiphery of said disks, said disks and flaws constituting carriers forslats, sald slats being adapted to be disposed across said carriers 11.In vcombination, a shaft, a'pair of disks affixed thereto, jaws on theperiphery ofsaid disks, said disks and jaws constituting carriers forslats, said slats being adapted to be disposed across sald carriers In--parallel relation to' said shaft, a cam wheel adjacent each disk, apair of vertically disposed rollers adapted to receive metal ribbonbetween them acent each dlsk, and means on one of said pair of rollersoperated upon by each of said cam wheels for causing said rollers torotate. r V r a 12. In combination, a shaft, a pair of disks afiixedthereto, jaws on the periphery of said disks, said disks and jawsconstitutmg carriers for slats, said slats being adapt- "ed to bedisposed across said carriers in parallel relation to said shaft, aribbon guiding member at one side of the path of each a shaft, pair ofof said jaws, means for feeding ribbons into c said guides and into thepockets of said jaws overthe slat contained therein, and

means interrupting the feeding of said ribbons after the ends of thesame have been disposed over said slat.

13. In combination, a shaft, {a pair of' disks affixed thereto, jaws onthe periphery of said disks, said disks and aws constituting carriersfor slats, said slats being adapted to be disposed across said carriersin parallel relation to said shaft, a ribbon guiding member at one sideof the path of each of said jaws, a pair of vertically disposed rollersadjacent one end of each of said ribbon guiding members, a spool ofribbon at one side of each of said rollers, cam wheels affixed to saidshaft adjacent each of said disks, and fingers projecting from one ofsaid pair of rollers, said fingers adapted to be wiped by said camwheels to rotate said rollers, whereby to feed said ribbons into saidribbon guiding members.

14. In combination, a shaft, a pair of disks aflixed thereto, jaws onthe periphery of said disks, said disks and jaws constituting carriersfor slats, said slats being adaptreceived in said conduits to drive saidnails through the ends of the slat held by said aws. 3 15. Incombination, a horizontally disposed drum for holding nails, a pair ofchutes from said drum down which said nails slide by gravity, a shaftdisposed transversely below said drum, a pair of disks afiixed thereto,jaws on the periphery of said disks, said disks and'jaws constitutingcarriers for slats, said slats being adapted to be disposed across saidcarriers in parallel relation to said shaft, a slat receptacle at oneside of said shaft, and a lever pivoted below said receptacle, one armof said lever being disposed at one side of the bottom of saidreceptacle, the other arm of said lever extending over the shaft andbeyond the periphery of said disks whereby said last mentioned arm iswiped by a slat carried by said disks.

17. In combination, a shaft, a pair of disks affixed thereto, jaws onthe periphery of said disks, said disks and jaws constituting carriersfor slats, said slats being adapted to be disposed across said carriersin parallel relation to said shaft, and a spring arm disposed adjacenteach of said disks, said arm extending to the periphery of said disks,whereby as a slat is carried up by,

said jaws it will contact with said spring. arm and be moved outwardlyagainst one face of said jaw.

In testimony whereof I affix my signature.

GLEN PARKS.

